Sewing-machine cloth-presser.



"No. 778,393. ,PATEN'IBD DEC. 27, 1904.

. 0, M. ABERGROMBIH.

SEWING MACHINE CLOTH PRBSSER.

' APPLICATION FILED SEPT. 80, 1904;

WITNEssEs INVENTOR A TTORNEY is a front elevation.

UNITED S ATES Patented December 27, 1904.

PATENT QFFICE.

CHARLES M. ABERCROMBIE, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO WHEELER5: WILSON MANUFACTURING COMPANY, OF BRIDGE- PORT, CONNECTICUT, ACORPORATION .OF CONNECTICUT.

SEWING-MACHINE CLOTH-PRESSER. I

SPECIFICATION forming part of Letters Patent No. 778,393, dated December2'7, 1904.

Application filed September 30, 1904. Serial No. 226,643.

To all, whom it may c0nccrn:

Be it known that I, CHAELEs M. ABEROROM- BIE, a citizen of the UnitedStates, residing at Bridgeport,in the county of Fairficld and State ofConnecticut, have invented a certain new and useful Improvement inSewing-Machine Cloth-Pressers, of which the following is a full, clear,and exact description.

- This invention relates to that class of presser-feet forsewing-machines in which a duplex or divided foot is used, the parts ofwhich are independently movable, so as to antomatically conform tovariations in the thickness of the material being sewed.

The present invention consists in a presserfoot of the characterdescribed having an equalizing; device interposed between its movablemembers in such way that movement of one of the members will betransmitted to the other, and thus while the parts of the presser-- footmay yield independently to inequalities in the work still the pressuremaintained on the individual parts will be the same. A convenientequalizing device consists of'a series of antifriction-balls interposedbetween the shanks of the parts of the presser-foot, with or withoutauxiliarylifting-springs.

In the accompanying drawings, illustrating the invention, in the severalfigures of'which like parts are similarly designated,,Figure 1 Fig. 2 isa perspective view from the rear. Fig. 3 is a front elevation, enlargedand partly in section. Fig. 4 is a side elevation, partly in section.

The bar 1 is the'usual presser bar, with which is connected adepressing-spring. (Not shown.)

2 and 3 are the presser-feet. The presserfoot 2 is pivoted to a shank 4,which is provided with two bearing-lugs 5 and 6, which are perforatedvertically, so as to slide longitudinally of the pres'ser-bar 1. Thepresserfoot 3 is pivoted to a shank 7, which is pro vided with a singlebearing-lug 8, also per forated vertically and applied to the presserbarso as to be capable of longitudinal movement thereon. This shank 7 ismade with a v longitudinal slot 9, and in this slot is arranged a headedpin 10, which is held in place therein by the set-screw 11. Between thelug 5 of shank 4: and lug 80f shank 7 is interposed an my invention isnot limited to it, but itis appli- I cable as well to any otherconstruction OfTli vided presser-foot.

I Asherein shown, the equalizing device of this inventioncomprises aseries of antifriction-balls 15, interposed between the shanks of thepresser-foot in such way that as one presser-foot rises it will move theballs against the other presser-foot, and thus equalize the pressurebetween the two..

A convenientmeans for transmitting motion comprises a follower-pin 16,fitted in the shank 4 and alined with the balls 15, and a plunger-pin17, slidably fittedin the lug 6 in line with the shank 7, so that as thepresserfoot2 and its shank rise the balls will be pushed over by the pin16 against the pin 17 and depress it against the shank 7, and therebytransmit to the presser-foot 3 the pressure that is upon thepresser-foot 2, and vice versa.

The balls 15 are arranged in a suitable groove 18 in a block 19, mountedupon the presserbar 1 above the lug6 and adjustaloly fixed on saidpresser-bar bya set-screw or other device 20, and the balls are heldwithin the groove by means of a flanged face-plate 21, fixed to theblock 19-by a set-screw 22 or other suitable device.

I While I prefer to use the series of balls as the equalizing device,the principle of my invention is embodied in any positively-actingmedium interposed between the shanks of the respective presser-feet andcapable of trans mitting the motion of one to the other, so as toequalize the pressure upon said presser-feet as they accommodatethemselves to inequalities in the work. Moreover, springs or othercounterbalancing or reacting devices may be used as auxiliaries to theballs, and in Fig. A I have shown one such use of springs.

23 is a coiled spring interposed in a pocket in bearing-lug 8 to reactbetween that lug and lug 6, and 24% is a coiled spring interposed in .apocket in block 12 and reacting against bearing-lug 8, so that sincethese springs exert a lifting action against the presser-foot shanks thepins 16 and 17 will be maintained in contact with theantifriction-balls. The invention, however, is not limited to the use ofthese springs or their equivalents. Either or both of the springs ortheir equivalents may be used, as desired, or omitted at pleasure.

What I claim is- 1. A divided presser-foot for sewing-machines, havingindependently-movable members adapted to accommodate themselves toinequalities in the work, and an equalizing device, includingantifrietion-balls, interposed between said independently-movablemembers and serving to transmit the pressure of one to the other.

2. A divided presser-foot for sewing-machines, havingindependently-movable members adapted to accommodate themselves toinequalities in the work, and a positive-action equalizingdeviee,including antifriction-balls, interposed between saidindependently-mova ble members and serving to transmit the which theyare mounted, antifrietion-balls interposed between said shanks, afollowerpin on one of the shanks alincd with the antifriction-balls, anda plunger-pin alined between the other shank and said antitrictionballs.

5. A divided presser foot having independently-movable shanks,apresser-bar upon which they are mounted, a block fixed to thepresser-bar above the shanks, antiirictionballs arranged in said blockand between the shanks and serving to equalize the 'n'essnre upon saidindependently-movable shanks.

6. A divided presser-i'oot having independently-movable shanks, apresser-lmr upon which they are mounted, a block fixed to thepresser-bar above the shanks, antifrictionballs arranged in said block,a follower-pin on one of said shanks in alinementwith the balls, and aplunger-pin interposed between the other shank and said balls.

7. A divided presser-foot for sewing-machines, havingindcpendently-n'loval le mem bers adapted to accommodate themselves toinequalities in the work, a positive-action equalizing device interposedbetween said independently-movable members and serving to transmit thepressure of one to the other, and an auxiliary spring for maintainingthe movable members in engagement with the equalizing device.

8. A divided press er-ioot for sewing-machines, havingindependently-movable members adapted to accommodate themselves toinequalities in the work, a positive-:u-tion. equalizing deviceinterposed between said independently-movable members and serving totransmit the pressure of one to the other, and a lifting-spring for eachmovable member.

In testimony whereof I have hereunto set my hand this 28th day ofSeptember, A. l). 190

CHARLES M. ABERCROMBIl Vitnesses:

A. S. Knrrn,

It. F. GARDNER.

